National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

St. Louis Lambert International Airport (KSTL)

Lat: 38.75°NLon: 90.37°WElev: 604ft.

Light Rain

70°F

21°C

Humidity 93%
Wind Speed SW 3 mph
Barometer 29.99 in (1014.2 mb)
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Last update 14 Oct 6:51 am CDT
Extended Forecast for

Clayton MO

  • Today

    Today: Showers and possibly a thunderstorm, mainly before 1pm, then a chance of showers and thunderstorms after 1pm. High near 78. North wind 3 to 6 mph. Chance of precipitation is 90%.

    High: 78 °F

    Showers then
    Showers
    Likely

  • Tonight

    Tonight: A slight chance of showers, then a chance of showers and thunderstorms after 10pm. Mostly cloudy, with a low around 67. Light and variable wind becoming east around 6 mph after midnight. Chance of precipitation is 40%.

    Low: 67 °F

    Chance
    T-storms

  • Thursday

    Thursday: Showers and possibly a thunderstorm, mainly before noon, then a chance of showers and thunderstorms after noon. Patchy fog between 9am and 11am. High near 83. East wind 6 to 9 mph becoming southwest in the afternoon. Chance of precipitation is 80%.

    High: 83 °F

    Showers and
    Patchy Fog
    then Chance
    T-storms

  • Thursday Night

    Thursday Night: Showers and possibly a thunderstorm before 1am, then a chance of showers. Low around 51. Southwest wind 7 to 15 mph becoming northwest after midnight. Winds could gust as high as 24 mph. Chance of precipitation is 80%.

    Low: 51 °F

    Showers

  • Friday

    Friday: Mostly sunny, with a high near 60. Northwest wind around 18 mph, with gusts as high as 30 mph.

    High: 60 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 41.

    Low: 41 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 62.

    High: 62 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 41.

    Low: 41 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 69.

    High: 69 °F

    Sunny

Detailed Forecast

Today
Showers and possibly a thunderstorm, mainly before 1pm, then a chance of showers and thunderstorms after 1pm. High near 78. North wind 3 to 6 mph. Chance of precipitation is 90%.
Tonight
A slight chance of showers, then a chance of showers and thunderstorms after 10pm. Mostly cloudy, with a low around 67. Light and variable wind becoming east around 6 mph after midnight. Chance of precipitation is 40%.
Thursday
Showers and possibly a thunderstorm, mainly before noon, then a chance of showers and thunderstorms after noon. Patchy fog between 9am and 11am. High near 83. East wind 6 to 9 mph becoming southwest in the afternoon. Chance of precipitation is 80%.
Thursday Night
Showers and possibly a thunderstorm before 1am, then a chance of showers. Low around 51. Southwest wind 7 to 15 mph becoming northwest after midnight. Winds could gust as high as 24 mph. Chance of precipitation is 80%.
Friday
Mostly sunny, with a high near 60. Northwest wind around 18 mph, with gusts as high as 30 mph.
Friday Night
Mostly clear, with a low around 41.
Saturday
Sunny, with a high near 62.
Saturday Night
Clear, with a low around 41.
Sunday
Sunny, with a high near 69.
Sunday Night
Partly cloudy, with a low around 48.
Monday
Mostly sunny, with a high near 73.
Monday Night
Partly cloudy, with a low around 51.
Tuesday
Mostly sunny, with a high near 77.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Clayton MO
 38.64°N 90.32°W (Elev. 558 ft)
Last Update:
5:06 am CDT Oct 14, 2026
Forecast Valid:
7am CDT Oct 14, 2026-6pm CDT Oct 20, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation